Wacom 13hd touch eraser issue

Hello guys. I have win8.1 , and EX version.
My problem is that I create a vectovector later layer and I work there. When I set the eraser for example to erase intersections, if I try to use it with the back side of wacom's pen nothing happened (like regular eraser). If I use it with the front side of pen then everything works perfect

I use Windows 7, so I don't know the Win8 issues firsthand, but one of the problems was the 'Windows Ink' —feature. It's commonly suggested to disable it in the Wacom driver configuration.

It's a check-box; enabled by default, and you find it in the the Windows Control Panel >> Wacom Tablet Properties. If your tablet is touch capable, you might try tapping five fingers at once on it, to open the tablet properties; some models do that.